Cluster incandescent lamp.



H. LYON.

CLUSTER'INCANDESCENT LAMP.

APPLICATION FILED MAYG. 1914.

COLUMBIA PLANOGRAPH 60.. WASHINGTON. D. c

Patented 001;. 26, 1915.

llhllT s'ra'rns rarnn'r orribn HOWARD LYON, F GLOUCESTER CITY, NEWJERSEY, ASSIGNOR TO WELSBAGH LIGHT COIVIPANY, 0F GLOUCESTER CITY, NEWJERSEY, A CORPORATION OF NEW JERSEY.

CLUSTER INOANDESCENT LAMP.

Specification of Letters Patent.

Patented Oct. 26, 1915.

To all whom it may concern:

Be it known that I, HOWARD LYON, a citizen of the United States,residing at Gloucester City, in the county of Camden and State of NewJersey, have invented a new and useful Improvement in ClusterIncandescent Lamps, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawings, formingpart of this specification, in which-- Figure l is a side elevationshowing the preferred form of any lamp; Fig. 2 is a vertical sectiontaken through one of the burner arms; and Fig. 3 is a top plan view.

My invention relates to inverted incandescent lamps, and is designed toprovide a cluster lamp of improved efficiency. The lamp is speciallydesigned for use with small limp or rag mantles of less than an inch indiameter, when shaped, as-set forth in the application of SverreGulbrandsen, Serial No. 886,671, filed May 16, 191fl, but may be usedgenerally for inverted nicandescent mantles.

The object of my invention is to improve the mixing, preventflash-backs, provide a cheap burner, and give high eificiency.

In the drawing, which represents a stand or table lamp with threeburners, 2 represents the gas supply tube, 3 the control valve, I thejet orifice with regulating needle, 5 the hood surrounding the airinlets of the Bunsen tube, and 6 the vertically extending Bunsen tube.'Within this Bunsen tube, I provide a lining tube or sleeve 7, which ispreferably of the form shown, that is, the bore gradually decreases fromthe entrance end toward the middle, where there is a straightcylindrical portion. From this cylindrical portion, the bore is taperedgradually outwardly in diverging conical form, as this is found toassist greatly in the proper mixing of the gas and air.

From the mixer tube, the mixture enters a central chamber or manifold 8,whence it flows through the burner arms 9 to the metal burner tips 10.The burner arms 9 curve outwardly and downwardly and also taper from themanifold end toward the burner tip, that is, the bore graduallydecreases in size from the chamber end toward the burner tip end. Thetapering of these burner arms is important, as this aids greatly ineffecting a good mixture and thus preventing flash-backs. The curvedform further assists in this action. A burner with arms of right--angledbend is found to flash-back in practice, with this type of burner.

In the cylindrical manifold 8 is placed a cylindrical impedance 11, inthe form of wlre gauze, which is preferably pushed in through the baseportion 12 of the burner v and will control the flow of gas to eachburner leg. By using this cylindrical gauze in the manifold instead ofplacing a gauze in each arm, the gauze is large enough to prevent toomuch impedance and provide proper entrainment'of air, while the taperingof the arm brings it down to the proper size for the correct area ofburner tip outlet.

In the use of this new burner, it is found that the blue cone of theBunsen flame is axial of the burner tip, where with former burners ofthe inverted cluster type, the tip of this blue cone is off center,being nearer the outside than the inside, and affording a starting pointfor a flash-back near the inner edge of the flame.

The drawings show my improved burner full size in the preferred formwhich I have used, and I prefer to have the length and proportions ofthe bore of the liner in the mixer tube, substantially as shown.

lhe burner preferably may be made in two pieces seamed together, asshown, or otherwise as desired. For instance, the burner may be cast andformed. I prefer the two-part form, however, as this affords a cheap andsimple construction, and the inner portions of the burner tips may beexpanded in place, thus securing the burner tips to the burner body orarms thereof. I also preferably employ a skirt 13, which surrounds thetube porti%n 12, this skirt catching the flow of gas from the burnersand directing it around to the pilot flame, thus insuring properignition at the burners. The pilot tube is shown at 14, and extends inthe usual manner as a bypass from the valve so that the pilot light isconstantly burning.

The advantages of my invention result from the cheap, simple andeffective cluster lamp which is provided, the avoiding of flash-backs,and the high efficiency afforded.

I claim:

1. A vertical cluster burner for inverted incandescent maps, having abaa'y paruon and a plurality of laterally and downwardly extendingburner arms, said burner arms each having a gas and air passageextendingtherethrough, means for securing a mantle to the lower end of eachburner *arm, and "a skirt surrounding the body portionbetween the burnerarms having an annular flange below the burner arms; substantially as described.

2. A cluster. burner for 'invertedgincandescent lamps, comprising amanifold having a plurality of arms extending laterally and downwardly,a burner tip connected to the lower end of each arm, each of said armshaving a tapering gas and air passage extending 'therethrough anddecreasing in 'diameterffrom the manifold to the upper ends of theburner tips, and a downwardly extending mixing chamber connected to thecenter. of "the manifold; substantially as described.

3. cluster burner for inverted incandescent lamps,,comprising amanifoldhaving a plurality .of arms extending laterally and downwardly, a burnertip connected to the lower :end of each arm, each of said arms havingatapering :gas and airpassag'e'extending'therethrough and decreasing indiameter from the manifold tothe upper ends of the burner tips, and adownwardly extending mixing chamber connected to the center of themanifold, said mixing chamber gradually decreasing'in size and {thengradually increasing from the manifold toward the lower end thereof;substantially as described.

4. A cluster burner for inverted incandescent la'mps, comprising acentral manifold having'a plurality of'arms extending outwardly anddownwardly, each of said arms containing a passage for the mixture ofgradually decreasing area toward the burner tip, and a downwardlyextending mixing connected to the manifold between the burner arms,substantially as described.

5. A cluster burner for inverted incandescent lamps, comprising amanifold having a plurality of separate outwardly and down- 'w ar lyextn ing curved burner arms connected laterally into the sides of themixing chamber, each of said arms having a tapering passage for themixture which decreases gradually from the manifold toward the burnertip, substantially as'descr'ibed.

6. A cluster burner for inverted incandescent lamps, comprising amanifold having a plurality of arms extending outwardly and ('ilo'vnwardl-y therefrom, burner tips conne'ct'ed to the lower ends of thearms, a downwardlyextending mixingtube connected to t-liecent'er-of'tliemanifold, and a skirt surrounding the mixing tube between the burnertips and so positioned as to receive mixture and produce an annularflame to light "the mixture from the various tips, substantially asdescribed.

'7. A cluster burner for inverted incandes cent lamps,'comprising amanifold having a plurality of'arins extending outwardly and downwardlytherefrom, burner tips connected to the lower ends of the arms, adownwardly extending inixing tube connected to the center of themanifold, a skirt surrounding the mixin-gtube between the'burner tipsandso positioned-as to receive'niixture and produce an annular flame tolight the mixture from the various tips, and a pilot tube arranged tolight the annulariiiixture under thes'kirtaround the mixing tube,substantially asdescribed.

In testimony whereof, (I have hereunto set myhand.

HOVVAR D LYON.

J. JOHNSON, L. F.*BoMnorr.

Copies of this patent may be obtained for five cents each, byladdressingthe Commissioner of Patents,

' Washington, D. G.

